Fix NPEs when handling referenced milestones that do not exist

James Moger

2014-09-04 270e9e762820833d6815e362034dc3f4809b6470

 src/main/java/com/gitblit/manager/NotificationManager.java

@@ -71,6 +71,11 @@
      return this;
   }

   @Override
   public boolean isSendingMail() {
      return mailService.isReady();
   }

   /**
    * Notify the administrators by email.
    *